WLC or Wireless lan controller explained |Free CCNA 200-301|

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What Is a WLAN Controller?
A WLAN controller is a network devices that manages wireless network access points that allow wireless devices to connect to the network.
ole and function of WLC
We have so many wireless devices nowadays which access wireless network or internet. We have almost become accustomed to expect wireless connection wherever we go.
In Your organization you certainly have more than one access point. You will have it in every room or on every floors or probably have them in different buildings and in very large organizations they could be even at different locations.
When we look at large Enterprise networks, a single access point is not enough.
Imagine a network with thousands of users.
You might have tens or even hundred of access point that you have to managed and to take care of.
And of course all of these access point has to be administered and you may need to make configuration changes or update security policies on those access points.
When you walk around the office, you want seamless connectivity and don’t want to get disconnected every time when your wireless device switches from one access point to another.
You want to have a stable wireless connection, wherever you go.
Switching seamlessly switching from one access point to another is called roaming.

This all requirements can be met by using a device called WLAN controller
It is usually a software loaded on one of yours servers or it’s an appliance like this one that’s centralize the management of these access points
Some people call this as a single pane of glass like i can go to one screen and I could see everything happening with my wireless access points .

By using WLC’s all management tasks are moved from the access points to the wireless LAN controller.
It takes care of authentication, roaming, creating new wireless networks etc.

this also makes it very easy to deploy new access points as you don’t have to do any special configurations you simply plug the access point into the network and the wireless controller takes it from there and allows to configure everything from the central point.
if you do need to make a change or configure something across all of your access points you can do it in one place on a single wireless controller and that wireless controller will push that configuration change to all of your access points of course

The main objective of the WLC or Wireless LAN Controller is to be able to centralize all the control of the access points,
The access points are only responsible for forwarding traffic, we call these  AP’s as LWAPs (Light Weight Access Point).
the wireless controller can also provide statistics and performance information so you’ll know exactly how well your wireless network is running.
Most wireless controllers have some type of reporting mechanism so that you can get long-term information about how well your wireless network is running

With all those feature i can say by using WLC AP’s are
Easy to access
Easy to manage
Error free

 Lightweight Access Point Protocol (LWAPP) is used on between WLC and AP to manage access points in large quantities by the network administrator or network operations center.
WLC is regarded as on of the important element of wireless network that is quick and effective.
I would like end by sharing one interesting fact about WLC
Despite being called a wireless LAN controller, a WLC is connected to the wired LAN and to the lightweight APs by wires. The WLC does not have any wireless connections.
In my next video i will be discussing about CISCO DNA Center controller.
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